The battle of the third castle begins. The attacking force has lost at Ueda’s Castle and Watanabe’s Castle, but Mr. SASUKE is back with his strongest pupil, swearing revenge! Boymen, a boy band from Nagoya, joins the force. But the attacking force will be confronted with extremely difficult challenges, such as From Right to Left and The Mushroom Pong World Cup. Can they make up for past defeats?